High big walt switching power supply smps

Q: What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

Q: How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Q: Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Q: Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.

About the High big walt switching power supply smps

The High big walt switching power supply smps is part of the ELEHPD S Series range. Features: • AC 176-264 input • Protections:Short circuit/Over load/Over voltage • Forced air cooling by built-in DC fan • Built-in cooling Fan ON-OFF control • 100% full load burn-in test • Fixed switching frequency at 25KHz • Low cost • 1 year warranty ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

Full catalogue description: high big walt switching power supply 720w 12v 24v smps

Typical applications

Motor control centres and pump or fan starters
Machine building, conveyors, packaging and CNC equipment
HVAC control panels and building automation
Water treatment, irrigation and pumping stations
Panel retrofits replacing electromechanical control gear

How to specify the right S Series

Size the contact rating for the inductive load, not just the resistive current (AC-3 duty for motors)
Check the coil voltage and frequency available in the panel: 24 V DC, 110 V, 230 V or 400 V AC
Confirm the auxiliary contact count needed for the control and indication circuit
Match the enclosure rating to the environment (IP20 inside a panel, IP65 on the machine)

Specifications

high big walt switching power supply 720w 12v 24v smps
Features :

• AC 176-264 input

• Protections:Short circuit/Over load/Over voltage
• Forced air cooling by built-in DC fan
• Built-in cooling Fan ON-OFF control
• 100% full load burn-in test
• Fixed switching frequency at 25KHz
• Low cost
• 1 year warranty

Model Specification	S-720-12	S-720-24	S-720-36	S-720-48	S-720-60
DC Output voltage	12V	24V	36V	48V	60V
Output voltage range	±1%	±1%	±1%	±1%	±1%
Rated output current	60A	30A	20A	15A	12A
Output current range	0~60A	0~30A	0~20A	0~15A	0~12A
Wave and noise	100mVp-p	180mVp-p	200mVp-p	220mVp-p	220mVp-p
Inlet stability	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%
Load stability	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%
DC output power	720W	720W	720W	720W	720W
Efficiency	83%	84%	85%	87%	87%
Adjustable range for DC voltage	±10%	±10%	±10%	±10%	±10%
AC input voltage range	176-264VAC , 47-63HZ 248-370VDC
Input current	7A/115V 3.5A/230V
Power factor	0.65 - 0.75
AC Inrush current	40A/230V
Leakage current	<3.5mA/240VAC
Overload protection	120%-150% Reset: auto recovery
Over-voltage protection	120%-150%
High-temperature protection	ERH3≥65°C~70°CFan on, ≤55°C~60°CFan off, ≥80°C~85°C, Cut off output (5-15V)~(24-48V)
Temperature coefficient	±0.04%/°C(0~50°C)
Setup, rise, hold up time	1.5s, 50ms, 20ms
Vibration	10~500Hz, 2G 10min,/1 cycle. Period for 60min, Each axes
Withstand voltage	I/P-O/P:1.5KVAC I/P-FG:1.5KVAC O/P-FG:0.5KVAC
Isolation resistance	I/P-O/P, I/P-FG, O/P-FG:100M Ohms/500VDC
Working temperature and humidity	-10°C~+60°C, 10%~95%RH
Store temperature and humidity	-20°C~+85°C, 10%~95%RH
Overall dimension	238X124X65mm (LWH)
Weight	1.5Kgs
Safety standards	GB4949,UL60950,EN60950
EMC standards	According to GB9254 EN55022 EN55024 A level design

Frequently asked questions about the High big walt switching power supply smps

What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.